thanks for the replies, and some further info.
They are looking at enforcing the bond as I no longer work for that airline.
It does not relate to the type rating but line training, sims(opc/lpc), initial safety training, hotels, meals, petrol etc etc
It is in the UK and i have consulted a lot of legal advice/authorities & pilot associations. I have been informed that the Courts tend to favour the individual, so what I am after is people who either have knowledge on this subject (you cannot get enough angles) or those who have genuine experience, or know someone (our legal system relies heavily on previous cases).
Please don't judge me for trying to avoid payment of this as you don't know all the facts and pprune is not the place for them. I also don't want this post to turn into a debate of if these bonds are right or wrong.